package com.sky.service.impl;

import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        System.out.println(password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
    //新增员工
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //属性复制
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码  dm5加密 默认123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //创建人和修改人的id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);

    }
    //员工分页查询
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //全部分页查询
        if(employeePageQueryDTO.getName() == null){
            //计算总员工
            int count = employeeMapper.selectCount();
            int start,end;
            start = employeePageQueryDTO.getPage()-1 * employeePageQueryDTO.getPageSize() < 0 ? 0 :
                    employeePageQueryDTO.getPage()-1 * employeePageQueryDTO.getPageSize();
            end = employeePageQueryDTO.getPage() * employeePageQueryDTO.getPageSize() <= count ?
                    employeePageQueryDTO.getPage() :
                    (count - employeePageQueryDTO.getPage()-1 * employeePageQueryDTO.getPageSize() < 0 ? count :
                            count - employeePageQueryDTO.getPage()-1 * employeePageQueryDTO.getPageSize());
            List<Employee> records = employeeMapper.select(start,end);

            return new PageResult(count,records);
        }
        //模糊查询分页查询
        else {
            //计算总员工
            int count = employeeMapper.selectNameCount(employeePageQueryDTO.getName());
            int start,end;
            start = (employeePageQueryDTO.getPage()-1) * employeePageQueryDTO.getPageSize() < 0 ? 0 :
                    (employeePageQueryDTO.getPage()-1) * employeePageQueryDTO.getPageSize();
            end = employeePageQueryDTO.getPage() * employeePageQueryDTO.getPageSize() <= count ?
                    employeePageQueryDTO.getPage() :
                    (count - (employeePageQueryDTO.getPage()-1) * employeePageQueryDTO.getPageSize() < 0 ? count :
                            count - (employeePageQueryDTO.getPage()-1) * employeePageQueryDTO.getPageSize());
            List<Employee> records = employeeMapper.selectName(employeePageQueryDTO.getName(),start,end);

            return new PageResult(count,records);
        }
    }
    //员工状态修改
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);
        employeeMapper.update(employee);
    }

    //员工信息修改
    @Override
    public Employee getBuId(Long id) {//查询员工
        return employeeMapper.selectById(id);
    }
    @Override
    public void update(EmployeeDTO employeeDTO) {//修改信息
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employeeMapper.update(employee);
    }

}
